EP1252388A2 - Verwendung einer verbindung zur verminderung und/oder vermeidung von ablagerungen von holzinhaltsstoffen - Google Patents
Verwendung einer verbindung zur verminderung und/oder vermeidung von ablagerungen von holzinhaltsstoffenInfo
- Publication number
- EP1252388A2 EP1252388A2 EP00993298A EP00993298A EP1252388A2 EP 1252388 A2 EP1252388 A2 EP 1252388A2 EP 00993298 A EP00993298 A EP 00993298A EP 00993298 A EP00993298 A EP 00993298A EP 1252388 A2 EP1252388 A2 EP 1252388A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- acid ester
- volatile
- gas
- dicarboxylic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/226—Use of compounds avoiding scale formation
Definitions
- the present invention relates to a method for avoiding and / or reducing deposits of volatile and non-volatile wood constituents in gas-carrying systems, the volatile wood constituents at least partially condensing in the gas-carrying systems.
- the present invention further relates to a method for reducing and / or avoiding deposits of wood constituents on machines and / or system parts for producing wood fibers from wood chips.
- the object is achieved according to the invention with a method for avoiding and / or reducing deposits of volatile and non-volatile wood constituents in gas-carrying systems, at least some of the volatile wood constituents at least partially condensing in the gas-carrying systems and the gas containing at least one compound which is similar Shows condensation behavior like the volatile wood constituents,
- Volatile wood constituents in the sense of the invention are all wood constituents that
- Reaction products in the sense of the invention are any products that contain the volatile wood components after the condensation, e.g. B. by polymerization.
- the deposits usually have non-volatile wood constituents, e.g. B. fine wood particles, which separate from the gas stream and adhere to the sticky films.
- the compound has a condensation behavior similar to that of the wood constituents; d. H. the compound and the wood constituents preferably condense at the same point in the gas-carrying system and preferably form a film there.
- the compound is preferably a dicarboxylic acid ester.
- the dicarboxylic acid ester is particularly preferably a dicarboxylic acid dialkyl and / or diisoalkyl ester of C2-C12 dicarboxylic acids with C1-C13 n- and / or isoalkanols such as di-n-butyloxalate, di-n-butylmalonate, di-n-butylsuccinate, di- n-butyl glutarate, di-n-butyl adipate, di-n-butyl suberate, di-n-butyl sebacate, dimethyl adipate, di-n-propyl adipate, diisopropyl adipate, diisobutyi adipate, di-tert-butyl adipate, diisoamyl adipate, di-n-hexyladipate (2-ethylbutyl) adipate
- the compound is very particularly preferably a di-n-alkyladipic acid ester and / or a di-iso-alkyladipic acid ester. Most preferred is the compound di-n-butyl adipate.
- the method according to the invention is suitable for avoiding and reducing deposits of volatile or non-volatile wood constituents in gas-carrying systems of any kind.
- the gas-carrying systems are preferably part of:
- Wood processing plant in particular a plant for the production of
- the gas-carrying system is very particularly preferably part of a plant for producing thermo-mechanical pulp (TMP) or a wood chip refiner plant, as described in WO 96/41914, which is hereby introduced as a reference and thus as part revelation applies.
- TMP thermo-mechanical pulp
- WO 96/41914 a wood chip refiner plant
- the gas which flows through the gas-carrying lines can be any gas, but preferably has water vapor.
- the compound is preferably metered into the gas in gaseous form.
- the person skilled in the art recognizes that the compound can, however, also be metered into the gas in the liquid state and then converted there into a gaseous state.
- the metering is preferably carried out continuously.
- the metered amount of the compound depends on the concentration of the volatile wood constituents in the gas and the gas volume flow.
- the concentration is preferably 100-5000 ppm, particularly preferably 200-2000 ppm and very particularly preferably 300-1000 ppm.
- the compound is preferably metered into the gas in such an amount that no deposits of volatile or non-volatile compounds and / or their reaction products form on the surfaces of the gas-carrying systems or that deposits already formed detach and / or dissolve again. Accordingly, the dosage of the compound is preferably regulated automatically.
- the pressure loss in the pipelines of the gas-carrying system and / or the degree of separation of cyclones, which are found in the gas-carrying system. are also preferred as
- Control parameters also the gas volume flow and the concentration of volatile
- the compound is metered directly into the water in another preferred embodiment of the process according to the invention.
- the compound must also be steam-volatile.
- the present invention has the advantage that the gas-carrying systems have to be cleaned less frequently and the systems therefore have a longer operating time. Because e.g. B. Cyclones are no longer added by deposits, their separability remains. Existing deposits are reduced.
- Another object of the present invention is to provide a method for reducing and / or avoiding deposits of wood constituents on machines and / or system parts for producing wood fibers from wood chips (wood chips).
- This object is achieved according to the invention by a method for reducing and / or avoiding deposits of wood constituents on machines and / or plant parts for the production of wood fiber materials from wood chips, in which the fiberization of the wood takes place in the presence of at least one compound which: on the surfaces of the Machines and / or system parts form a film and
- Deposits of volatile wood constituents and / or their reaction products are at least reduced.
- deposits are any deposits of wood constituents in gas- and / or water-carrying systems and / or on other systems or machine parts which are used for the production of wood fiber materials.
- the compound is preferably a dicarboxylic acid ester.
- the dicarboxylic acid ester is particularly preferably a dicarboxylic acid dialkyl and / or diisoalkyl ester of C2-
- C12 dicarboxylic acids with C1-C13 n- and / or iso-alkanols such as di-n-butyl oxalate, di-n-butylmalonate, di-n-butyl succinate, di-n-butyl glutarate, di-n-butyl adipate, di-n-butyl suberate , Di-n-butyl sebacate, dimethyl adipate, di-n-propyl adipate, diisopropyl adipate,
- Diisodecyl phthalate and the corresponding terephthalic acid esters and the diesters of C9-dicarboxylic acid (trimethyladipic acid) and dodecanedicarboxylic acid Diisodecyl phthalate and the corresponding terephthalic acid esters and the diesters of C9-dicarboxylic acid (trimethyladipic acid) and dodecanedicarboxylic acid.
- the compound is very particularly preferably a di-n-alkyladipic acid ester and / or a di-iso-alkyladipic acid ester. Most preferred is the compound di-n-butyl adipate.
- the esters can be used alone or in combination with water-soluble or water-insoluble solvents as an anhydrous or water-containing solution or as a water-containing dispersion, preferably an emulsion.
- Suitable solvents are n- and iso-alkanols, liquid hydrocarbons, acetone and other known solvents, in particular natural oils or modified natural oils, such as methylated rapeseed oil, are used.
- Nonionic, ionic and amphoteric, in particular nonionic, surfactants are used as emulsifiers in the preparation of the dispersions.
- Suitable nonionic emulsifiers are, for example, oxalkyl ethers, preferably oxethylates and / or terminally blocked oxethylates of fatty alcohols and fatty acids or oils.
- Suitable anionic emulsifiers are alkyl and / or aryl sulfonates, ⁇ -olefin sulfonates, ⁇ -sulfofatty acid esters, sulfosuccinic acid esters as well as alkyl sulfates and ether sulfates as well as carboxymethylated oxethylates and soaps.
- the preparation of the preferably stable emulsions is known.
- the hydrophobic phase is introduced into the aqueous emulsifier-containing phase and dispersed with stirring and pumping.
- the plant for the production of wood fiber materials has at least one refiner, such as that used for. B. from WO 96/41914 or from WO 96/35016 is known. These patent applications are hereby incorporated by reference and are therefore considered part of the disclosure.
- the dicarboxylic acid ester is preferably metered into the refiner together with the clear filtrate.
- the metering is preferably carried out continuously.
- the dicarboxylic acid ester concentration in the first refiner is 100-5000 ppm, particularly preferably 200-2000 ppm and very particularly preferably 300-1000 ppm.
- the method according to the invention is suitable for machines and systems for wood fiberization of any kind.
- the machines and / or systems are preferably part of the TMP method or a method as described in WO 96/41914.
- the present invention it is possible to considerably extend the running times of machines and systems for the production of wood fiber materials.
- the systems are easier to regulate and the service life of the refiner's grinding set can be extended.
- the method according to the invention can be integrated into existing systems. Already existing deposits are reduced by the method according to the invention.
- FIG. 1 shows a process flow diagram for the production of thermo-mechanical pulp (TMP).
- Cleaned wood chips are conveyed to the 1st refiner stage, where they are mechanically broken down in the presence of clear filtrate and 330 ppm TALLOFIN ® TMP.
- TALLOFIN ® TMP is a product of Stockhausen GmbH & Co. KG, which contains 40% by weight of di-n-butyl adipate and 60% by weight of a nonionic emulsifier.
- the TALLOFIN ® TMP is dosed into the clear filtrate before it flows into the refiner. Due to the very high energy input, the refiner (up to 22 MW) temperatures of above 200 ° C and pressures of 2-3 bar, so that a significant part of the refiner (up to 22 MW) temperatures of above 200 ° C and pressures of 2-3 bar, so that a significant part of the refiner (up to 22 MW) temperatures of above 200 ° C and pressures of 2-3 bar, so that a significant part
- the steam is removed from the refiner through steam lines and fed to heat recovery.
- the steam also contains a certain proportion of di-n-butyl adipate, so that the steam lines, the cyclones and the control elements in the steam lines have no or only slight deposits. But even in the refiner itself, no or to a much reduced extent deposits of wood constituents form, so that this has to be cleaned less frequently and the service life of the grinding set is increased.
- the wood fibers are mechanically comminuted again in the second refiner stage before they are then subjected to the further treatment known to the person skilled in the art.
- Large quantities of steam are also generated in the second refiner stage, which are then used for heat recovery.
- the steam in turn also contains a certain proportion of di-n-butyl adipate, so that the steam lines, the cyclones and the control elements in the steam lines have no or only slight deposits. But even in this refiner itself no or to a much reduced extent deposits of wood constituents form, so that this has to be cleaned less frequently and the service life of the grinding set is increased.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Golf Clubs (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19959826A DE19959826A1 (de) | 1999-12-10 | 1999-12-10 | Verfahren zur Verminderung und/oder Vermeidung von Ablagerungen von Holzinhaltsstoffen |
DE19959826 | 1999-12-10 | ||
PCT/EP2000/011926 WO2001042555A2 (de) | 1999-12-10 | 2000-11-29 | Verfahren zur verminderung und/oder vermeidung von ablagerungen von holzinhaltsstoffen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1252388A2 true EP1252388A2 (de) | 2002-10-30 |
EP1252388B1 EP1252388B1 (de) | 2004-06-02 |
Family
ID=7932319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00993298A Expired - Lifetime EP1252388B1 (de) | 1999-12-10 | 2000-11-29 | Verwendung einer verbindung zur verminderung und/oder vermeidung von ablagerungen von holzinhaltsstoffen |
Country Status (11)
Country | Link |
---|---|
US (1) | US20040011482A1 (de) |
EP (1) | EP1252388B1 (de) |
CN (1) | CN1409783A (de) |
AT (1) | ATE268406T1 (de) |
AU (1) | AU2837601A (de) |
CA (1) | CA2394173A1 (de) |
DE (2) | DE19959826A1 (de) |
NO (1) | NO322867B1 (de) |
RU (1) | RU2002117417A (de) |
TW (1) | TW541382B (de) |
WO (1) | WO2001042555A2 (de) |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2735300C2 (de) * | 1977-08-05 | 1982-03-25 | Konrad 6380 Bad Homburg Mattern | Verfahren zum Behandeln von flüssigen Abfällen |
DE3809663A1 (de) * | 1988-03-23 | 1989-10-12 | Metallgesellschaft Ag | Verfahren zur verminderung von ablagerungen in anlagen zur eindampfung von sulfitablaugen |
US5080759A (en) * | 1990-09-04 | 1992-01-14 | Quaker Chemical Corporation | Method for controlling stickies in pulp and papermaking processes using recycled paper |
CA2059256A1 (en) * | 1992-01-13 | 1993-07-14 | David Arthur Aston | Pitch control |
US5256252A (en) * | 1992-07-15 | 1993-10-26 | Nalco Chemical Company | Method for controlling pitch deposits using lipase and cationic polymer |
DE4311598A1 (de) * | 1993-04-08 | 1994-10-13 | Henkel Kgaa | Verfahren zur Kontrolle des Absetzens klebender Verunreinigungen aus Papierstoff-Suspensionen |
US5779858A (en) * | 1995-04-12 | 1998-07-14 | Betzdearborn Inc. | Deposition control in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatin |
US5723021A (en) * | 1995-04-12 | 1998-03-03 | Betzdearborn Inc. | Method for inhibiting deposition in pulp and papermaking systems using a composition comprising of polyvinyl alcohol, gelatin and cationic polymer |
DE19519268C1 (de) * | 1995-05-31 | 1997-01-23 | Stockhausen Chem Fab Gmbh | Verwendung von Mitteln zur Zellstoff- und Papierherstellung |
BR9606439A (pt) * | 1995-06-12 | 1998-07-14 | Sprout Bauer Inc Andritz | Processo de produzir pasta a partir de material ligno-celulósico contendo fibras em um sistemas de refino dotado de um refinador primário |
NZ331188A (en) * | 1996-02-02 | 1998-11-25 | Hercules Inc | Emulsifier system for rosin sizing agents |
DE19616733C2 (de) * | 1996-04-26 | 2000-07-13 | Stockhausen Chem Fab Gmbh | Verfahren zur thermisch-mechanischen Oberflächenbehandlung von flächenförmigen Materialbahnen, insbesondere aus Papier und Karton unter Verwendung von Abhäsivmitteln |
US5746888A (en) * | 1996-07-09 | 1998-05-05 | Betzdearborn Inc. | Methods for inhibiting organic contaminant deposition in pulp and papermaking systems |
US5762757A (en) * | 1996-12-05 | 1998-06-09 | Betzdearborn Inc. | Methods for inhibiting organic contaminant deposition in pulp and papermaking systems |
DE19704054C2 (de) * | 1997-02-04 | 2000-08-10 | Stockhausen Chem Fab Gmbh | Verfahren zur Herstellung von Faserstoffen mit verbesserten Eigenschaften |
US6113738A (en) * | 1998-03-16 | 2000-09-05 | Nalco Chemical Company | Use of additives to breakdown and stabilize wax during fiber recycle |
US6256387B1 (en) * | 1999-07-06 | 2001-07-03 | Chin-Yang Wang | Device rack |
US6558513B1 (en) * | 2001-05-29 | 2003-05-06 | Hercules Incorporated | Non-aqueous release from paper machine equipment |
-
1999
- 1999-12-10 DE DE19959826A patent/DE19959826A1/de not_active Ceased
-
2000
- 2000-11-29 US US10/148,210 patent/US20040011482A1/en not_active Abandoned
- 2000-11-29 EP EP00993298A patent/EP1252388B1/de not_active Expired - Lifetime
- 2000-11-29 WO PCT/EP2000/011926 patent/WO2001042555A2/de active IP Right Grant
- 2000-11-29 DE DE50006708T patent/DE50006708D1/de not_active Expired - Lifetime
- 2000-11-29 AU AU28376/01A patent/AU2837601A/en not_active Abandoned
- 2000-11-29 AT AT00993298T patent/ATE268406T1/de active
- 2000-11-29 RU RU2002117417/12A patent/RU2002117417A/ru unknown
- 2000-11-29 CA CA002394173A patent/CA2394173A1/en not_active Abandoned
- 2000-11-29 CN CN00816924A patent/CN1409783A/zh active Pending
- 2000-12-06 TW TW089125951A patent/TW541382B/zh active
-
2002
- 2002-06-06 NO NO20022676A patent/NO322867B1/no not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0142555A3 * |
Also Published As
Publication number | Publication date |
---|---|
WO2001042555A3 (de) | 2001-12-06 |
AU2837601A (en) | 2001-06-18 |
RU2002117417A (ru) | 2004-01-27 |
EP1252388B1 (de) | 2004-06-02 |
DE50006708D1 (de) | 2004-07-08 |
CA2394173A1 (en) | 2001-06-14 |
CN1409783A (zh) | 2003-04-09 |
NO322867B1 (no) | 2006-12-18 |
NO20022676L (no) | 2002-06-06 |
NO20022676D0 (no) | 2002-06-06 |
ATE268406T1 (de) | 2004-06-15 |
DE19959826A1 (de) | 2001-06-28 |
WO2001042555A2 (de) | 2001-06-14 |
TW541382B (en) | 2003-07-11 |
US20040011482A1 (en) | 2004-01-22 |
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